Friction shock-absorbing mechanism



.1. F. OCONNOR.

FRICTION SHOCK ABSORBING IVIICI-IANISIIIx Patented (Ict. 24, W22.

APPLICATION FILED OCI'. 24, |921.

2 SHEETS-SHEE`I I.

Patented 0015 47 4% SHEETS-slm:

'1. F. OCONNOR.

FRlcTloN SHOCK AsoRlNG MECHANISM. v

APPLICATION FILED OCI. 24, 192|.

Patented et.. @t9 l2.

.tenir r. oeeitnon, or. teniendo, mentors, assren'on 'ro winnaars n.iranien, or

. enana', vnew' rena.

lltllCTllIUN SHU-ABSORJBING MECHANESM.

Application nleli lilotoloer 2li, 1192i. Serial No. 509,770.

To all@ from it hay camera:

Be it'lrnown that ll, .loma iF. @"CoNNoR,

a citizen of the UnitedStates, residing atl tion shock absorbingmechanism, especially adapted" for 'railway draft riggings and whereinare employed certain means forfacilitating the release of the frictionelements.

in thedrawings forminl a part of Athis specification, Figure ,i is aorizontal longitudinal'sectional view of a portion of a railv way draftrigging showin my improvements in'connection therewith. Fig. 2 is alvertical transver sectional view taken substantially' on the line 2--2of Fig. l. liig.`

3 is an enlarged transverse vertical sectional view of the shockabsorbing mechanism proper corresponding tothe line 3 3- of lig. 1. Fig.a is a longitudinal vertical sectional view parts being broken away,corresponding to. the line 4 4 of Fig. 3. lFigs.

i 5,6, 7 and 8 are detail perspectives of the main wedge, on of thefrictioh-shoes,.a supplemental wedge, and an mnerwedge, em-4 ployed inmy construction.4 And Fig. 9 is a view similar-to Fig. 1 illustratinganother embodiment of theinvention.

. Referring to the construction illustrated in Figs. l to 8 inclusive,10--105 denote channel draft sills of a ear `under-frame to the fill'inner faces of which are secured front stop lugsllland rear stop lu 12.A portion of a drawbar is indicate at 13 the same being operatively-associatedwith the shock Iabsorbing mechanism lproper by .a hooded castyoke 1t and coupler'lrey 15. The shock absorbing mechanism roper,hereinafter described, and a'front 'ollower 16 are contained within theyoke and are supported with the latter `by saddle plate 17.

'.llhe improv i shoclr absorbing mechanism means of a detachable proper,.as shown, comprises a" combined friction `shell and spring cage castingl-i; a main springfresistance-B; a' air of friction shoes C-C a mainwedgepD; a spring follower E; 4inner wedges lF--Fg a central wedgeG; acompensating spring H; and a retainer bolt d.

The casting A is of generally'rectangular formation as indicated at 20to provide a Ycentering spring cage, said casting having Ialso anintegral' rear wall 21 adapted to act as the follower in conjunctionwith the stop lugs 12. rllhe friction shell proper is atthe outer orforward end of the casting A; and, as will` be seen from Figs. 1, 2 and3, is of -rectangular'shape providing a pair of opposed longitudinallyextending friction surfaces 22--22 which are preferably slightly taperedinwardlyv of the mechanism'.

-form having upper and lower horizontal wallsl48-1a side walls lil-19,the rectan-j f guiar formation' changing to a cylindrical The twofriction shoes 'C-C are oflike construction and each is formed on itsouter side with a longitudinally extending friction surface`23cooperable with `a corresponding shell surface 22. @n its inner side,each shoe C is provided with a wedge face 24C and 'tall' that is.,transversely ofI the friction she l and at right angles to the wedgefaces 2t to cooperate with the wedge elements E' hereinafter described.`

'llhe main pressure transmitting wedge D is in the form of a relativelyhea u block having an outer transverse face 27Vhearing against the'vfrontv follower 16 and apair of inwardly converging wedge faces 28--28enageable and cooperable with the wedge faces 241; of theshoes:

.lhe spring follower il) bears on the forward end of the main spring B,the rear end'of the latter resting agalnst the wallvalso 'with a pairofupper and-lower hori-n 'zntally extending wings 25--25 which all lid

f do

of the casting A. Said spring follower E is in the forni of a,rectangular plate and9 in normal position? is spaced from the inneredges of the shoes C, as indicatedv in Figs l and 4.

The inner wedges l?, two in number, are of" like construction and eachis oi:x substantially equilateral triangular cross-section. as shown inFig; li, thus providiing,` three transversely extending faces 29, 30.and The faces 29 engage with the iront side of the follower lf3 and thefaces 30 have wedging engagement with the wedge faces 26 or theshoes.lihe other wedge faces 3l or the wedge elements F have wedging;engagement with the auxiliary centrally disposed wedge hloclr G', thelatter also extending transversely of the shell and having two sidewedge faces {i2- 32.

ilihe auxiliary wedge oloclr G is normally spaced-a slight distance fromthe inner end or the main wedge D? shown in `lFigs. l and and isnormally held in such position by the compensating spring lol which isunl der compression and adapted to expand when conditions permitc Theretainer holt J' is anchored its rear end in .a hollow boss formedintegrally with the casting` A., and, at its rorward end withf` in asuitable recess provided in the main wedge D, the latter, the wedgehloclr G and the follower E being suitably apertnred t accommodate theshank of the bolt.

' ln Operation, assuming an inward or huil"- ing movement of thedrawbar, the rnain wedge D is forced rearwardly thus creating lateralpressure. on the shoes C and causing the latter to travel inwardly ofthe friction shell. The resistance of the main spring is transmitted tothe slices througl the follower E and wedge eiernents F against thelateral wings 25 of the shoes, and es' the resistance of the main springgradually increases., the wedge elements l" will he gradually forcedrorwardlgT with respect to the wings oi the shoes, 'thus in turn forcingthe wedge bloclr GA outwardly vith respect to the mein wedge D andcompressing the spring` il still farther. lin release, after removal ofi the actuating force., the spring ld immediately reacts tending toloosen the main wedge D from the shoes, this action being supple inentedhy the reaction of the inain spring which presses on the follower,which, in turin tends to force the wedge elements F still furtheroutwardly with respect to the shoes C, in the event the shoes C shouldstick temporarily to the shell during; the initiation of the releaseaction. enabled to employ the niain spring B to assist in disengagingthe main pressure-transmitting wedge from the shoes.

'In the construction iilustrated in Fig. 9 the arrangement of parts isexactly the seine ss that sho-wn inthe other ignres except that .in thismanner. ll ein incense the friction shoes C are provided with wedgeroller seats 4:0 to accommodate :intifriction rollers il which areemployed. between the shoes C and wedge feces ot thc mainpressure-transmitting wedge D".

l have herein Shown and described what l. now consider the preferredmanner of currying out the invention, but the some is merelyillustrative and I contemplate :ill chzmgcs andmodilicstions that comewithin the scope of the claims appended hereto I claim:

1. ln a friction shock absorbing; mecha nism, the combination with afriction shell having interior friction surfaces; of friction-shoescooperable with said shell g s main pressure transmitting wedgecoogersblc, with the shoes; a main sibiring resistance; a spring;

follower; inner wedge elements between said follower and the shoes; andwedge ineens interposed between said inner4 wedge ele ments and theniain wedge.

2. in a friction shock absorbing mechanisni, the combination with afriction shell having interior friction surfaces; oi *friction-shoescooperahle with said shell; o niziin pressure transmitting wedgecooperohlc with the shoes; a nia-in spring;l resistance; :i spring4follower; inner wedge elements between said follower and Ythe shoes; :icentrally disposed wedge block cooperahle with said .inner wedgeelements; and n compensating; springl interposed between said wedgeblock' und the main wedge.

3. ln a friction shock absorbing` mechanism, the combine-tion with afriction shell having interior friction surfaces extending:longitudinally; of wedge friction-shoes cooperable with the shell; [iinain pressure- -transrnitting wedge cooperable with the shoes; a mainspring resistance; :i spring follower; inner wedge elements interposedbetween said follower and the shoes und having wedge engagement with theletter it right angles to the wedge engagement between the main wedgevand the shoes; and wedge means interposed 'between seidinner wedgeelements and the main wedge.

4;. ln a friction shoclr absorbing' mechaN nism, the combination with afriction shell having interior friction surfaces extendinglongitudinally; of wedge it'rictioirshoes cooperable with the shell; amain pressureti'ansmitting wedge cooperable with the shoes; a mainspring resistance; a spring follower; inner wedge elements interposedbetween seid follower and the shoes and having wedge-engagement with thelatter at right angles to 'the wedge-engagement hctween the main wedgeand the slices; a centrel wedge hlocll; cooperahle with said inner wedgeelements;and a compensating springinterposed between seid wedge blockand ,the main wedge.

5. In s friction shoclr absorbing incohelLtl fifteen nism, thecombination with a friction shell of substantially rectangular formhaving a pair of interior opposed friction surfaces;

of a pairv of friction-shoes having outer friction surfacescooperablewith the shell friction surfaces, each shoe being provided with aninwardly extended pair of lateral wings and a wedge face between saidwings eX- tending at right angles to the latter; a main wedge cooperablewith the wedge faces ,of the shoes; a main spring resistance; a springfollower; inner wedge elements extending lengthwise of said wings andhaving wedge,

engagement with the latter and also bearing upon said spring follower;and wedging means interposed between said wedge elements and lthe mainwedge.

6. ln a friction shock absorbing mecha-` nism, the combination with afriction shell of substantially rectangular form having a pair ofinterior opposed friction surfaces; of a pair of friction-shoes havingouter friction surfaces cooperable with the shell friction surfaces,each shoe being provided with an inwardly extended pair of lateral wingsand a wedge face between said win extending at right anglesto thelatter; a main wedge cooperable with the wedge faces of; the shoes; amain spring resistance; a spring follower; inner wedge elementsextending lengthwise of saidjwings and having wedgeengagement with thelatter and also bearing upon said spring follower; a central wee blockinterposed between said wedge eements; and a compensating rspringintersurface and a pair of inwardly extended. wings at right anglesthereto and a wedge' face between the wings; of a mainpressuretransmitting wedge cooperable with the wedge faces of the shoesanddisposed partly .between the wings of the shoes; a follower at theend of the main spring resistance a d 4 jacent the shoes; a pair of wedelemts bearing on the outer side .of said follower, said wedge elementsextending parallel'to the wings of the shoes and havin wedgeengagementwith theinner edges o the latter' a wedge block interposed between saidwe ge elements and cooperable with the latter, said wedge block beingnormally Lslightly spaced from the main wedge;and a compensating springinterposed between said wedge block and the main wedge.

ln witness that ll claim the foregoing ll have' hereunto subscribed myname this 17th day .of Oct., 1921. i JUHN li". CUNNR. Witnesses: C Gare,ANN' Bat wie

